1G = 1 000 000 000 (giga) - rarely seen in electronics
For historical reasons (which annoy me) capacitance values that naturally fall in the nano range are often given in micro or pico range:47,000pF (more naturally expressed as 47nF)0.001uF (much more sensible to say 1nF)This reluctance for the electronics industry to use nano prefix is probably why you aren't confident about it. Oddly the same thing does not happen with inductance values where nH are routinely used.
if I have a chip that uses .65 micro amp (.65 uA) and another that uses 100 nA, which is using less power?
(If you are from the U.S. then please look up the meaning of irony)
we learned about all sorts of prefixes (deca, hecto, deci, centi) that are now rarely used.
I mean, when I learned about the metric system, we learned about all sorts of prefixes (deca, hecto, deci, centi) that are now rarely used.